android - 如何将android中的动画链接到同一个视图？

Question

我得到了一些文本视图，我想制作 MSN 的嗡嗡声效果。

我的计划是：

• 看风景，让我们说左边 10dip，
• 把它带回它的起始位置
• 在那之后采取它10dip up
• 然后回来
• 往后退
• 离开……等等。

我的观点是，我想将一些动作序列设置为一个视图，并且需要一个接一个地执行。

我怎样才能做到这一点？

Answer 1

您可能是指AnimatorSet（不是AnimationSet）。如文档中所述：

此类按指定顺序Animator播放一组对象。动画可以设置为一起播放、按顺序播放或在指定延迟后播放。

将动画添加到 AnimatorSet 有两种不同的方法：可以调用playTogether()或playSequentially()方法来一次添加一组动画，或者play(Animator)可以与Builder类中的方法一起使用来逐个添加动画。

view在 期间移动然后消失-100px的动画：700ms300ms

final View view = findViewById(R.id.my_view);

final Animator translationAnimator = ObjectAnimator
        .ofFloat(view, View.TRANSLATION_Y, 0f, -100f)
        .setDuration(700);

final Animator alphaAnimator = ObjectAnimator
        .ofFloat(view, View.ALPHA, 1f, 0f)
        .setDuration(300);

final AnimatorSet animatorSet = new AnimatorSet();
animatorSet.playSequentially(
        translationAnimator,
        alphaAnimator
);
animatorSet.start()

Answer 2

我有一个可用于构建复杂动画链的 sdk 15 兼容类的开始，希望它可以帮助某人。您应该能够按照设计模式添加自己的方法。如果你这样做，请在这里评论他们，我会更新答案，干杯！

package com.stuartclark45.magicmatt.util;

import java.util.LinkedList;
import java.util.List;

import android.animation.Animator;
import android.animation.AnimatorSet;
import android.animation.ObjectAnimator;
import android.view.View;

    /**
     * Used to build complex animations for a view. Example usage bellow makes view move out to the
     * right whilst rotating 45 degrees, then move out to the left.
     *
     * {@code
     *  int rotateDuration = 200;
     *  int rotation = 45;
     *  new AnimationBuilder(view)
     *    .translationX(100, rotateDuration)
     *    .rotateTo(rotation, rotateDuration)
     *    .then()
     *    .translationX(-200, rotateDuration)
     *    .start();
     * }
     *
     * @author Stuart Clark
     */

    public class AnimationBuilder {

      private View view;
      private List<Animator> setsList;
      private List<Animator> buildingList;

      public AnimationBuilder(View view) {
        this.view = view;
        this.setsList = new LinkedList<>();
        this.buildingList = new LinkedList<>();
      }

      public AnimationBuilder rotateTo(float deg, long duration) {
        buildingList.add(ObjectAnimator.ofFloat(view, "rotation", deg).setDuration(duration));
        return this;
      }

      public AnimationBuilder translationX(int deltaX, long duration) {
        buildingList.add(ObjectAnimator.ofFloat(view, "translationX", deltaX).setDuration(duration));
        return this;
      }

      public AnimationBuilder translationY(int deltaX, long duration) {
        buildingList.add(ObjectAnimator.ofFloat(view, "translationY", deltaX).setDuration(duration));
        return this;
      }

      public AnimationBuilder then() {
        createAniSet();
        // Reset the building list
        buildingList = new LinkedList<>();
        return this;
      }

      public void start() {
        createAniSet();
        AnimatorSet metaSet = new AnimatorSet();
        metaSet.playSequentially(setsList);
        metaSet.start();
      }

      private void createAniSet() {
        AnimatorSet aniSet = new AnimatorSet();
        aniSet.playTogether(buildingList);
        setsList.add(aniSet);
      }


    }

Answer 3

使用AnimationSet：

AnimationSet set = new AnimationSet(true);

Animation animation = new AlphaAnimation(0.0f, 1.0f);
animation.setDuration(100);
set.addAnimation(animation);

animation = new TranslateAnimation(
    Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF, 0.0f,
    Animation.RELATIVE_TO_SELF, -1.0f, Animation.RELATIVE_TO_SELF, 0.0f
);
animation.setDuration(500);
set.addAnimation(animation);

view.startAnimation( set );